Answer: mordant

AnswerCrossword Clue
MORDANTSharply sarcastic, as wit
MORDANTBiting
MORDANTSarcastic.
MORDANTCutting.
MORDANTBitterly sarcastic.
MORDANTSarcastic, as speech, wit, etc.
MORDANTScathing
MORDANTCaustic in manner
MORDANTBitingly sarcastic
MORDANTIncisive
MORDANTCaustic
MORDANTSharply sarcastic
mordantsarcastic; biting
mordantburning; corrosive
mordantto treat with a caustic substance